Gas-engine base.



E J. GULIGK.

GAS ENGINE BASE,

APPLICATION FILED SEPT. 22, 1909. 1,@81,?85a Patented July 9, 1912.

4 SHEETS-SHEET i.

E. J. GULICK.

GAS ENGINE BASE. APPLIGATION FILED SEPT. 22, 1909.

1 9M385. Patented July 9, 1912.

4 SHEETS-SEEET 2.

E. J. GULIGK.

GAS ENGINE BASE. APPLICATION FILED SEPT. 22, 1909.

1,631,?85. Patented July 9, 1912.

4 sums-snsm s.

E. J. GULIUK.

GAS ENGINE BASE. APPLICATION FILED MP1. 22, 1909.

1,031 '?85 Patented July 9, 1912.

4 SHEETS-SHEET 4.

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" EDWARD J. searc er lursnawana, INDIANA, Assre-non To run can company, or nrswana, INDIANA, A ccarona'rrou or-rivn a ancient-e5.

. To. all ivh'om z't ntay concern:

Gas-Enema nssni.

:Be .itdmow'n that I, EDWARD J. GuLIcK, a citizen of the United States, residing at Mishawaka, in the county of oseph and State otlndiana, have invented certain new and useful Improvements in Gas-Engine Bases, ofwhich the following is a specification. s

This invention relates. to the art of gas engines, and has reference more particularly to a novel structure of gas engine base adapted for use in connection with twocycle engines wherein theexplosive charge lscompressed by the piston on/ its outer or working stroke into a chamber surrounding the crank, and passes thencethrough a bypass into the cylinder of the engine. A. fault which is very prevalent in engines of this type resides in" the tendency of the compressed gases in the crank chamber to leak out either where the base is secured'to the inner end of the cylinder, or through the bearings of the crank-shaft in the crankchamber or base, 1

Oneobjectofmy inventionis to provide a. construction of gas engine base whereby,

this leakage'may be prevented.

Another object of theinvention is to provideyabase frame construction of such character t-hat'it may be readily opened to atvlord easy access to the crank-shaft, bearings, journal boxes, etc., Without the necessity ofremoving anything except aiportion'oitthe base frame itself.

To these and other minor ends, the invention consists in the novel features of "cony companyihg drawlngs, in which-- structionhereinafter described and more particularly. pointed out in the claims.

n One practical form in which my invent on be embodied is illustrated in the ac- Figure 1 is a side elevational view of my engine base. Fig. 2 isa similar view from the opposite side thereof. Fig. 3 is a corn tral longitudinal vertical section through *the base frame, the contained-parts being omitteditor the sake'ot clearness. Fig. l

. is a cross-sectional view on the line of Fig. 3, also showing one ot the ournal boxes 7 in elevation land the-' crank-shaft in "cress slectiontherein. Fig. 5 is across-see. tiQD fin lh j-lim'e 55 .ofFigi. F ig.'6 is 'anend'ielevation of one otthejalboxes detect Fig.5. Fig. 8,.

' ":efithe-ajournal boxes;

Specification of Letters Patent.

Patented July 9, 1912.

Application filed. September 22, 1909. Serial No. 518,966.

shown in Figs. 6 and 7. Figs. 9 and 10 are central longitudinal sections of the lower and upper halves of the journal boxes, re-

spectively; and Fig. 11 is an enlarged'central longitudinal section through the intermediate portion of the base structure shown in Fig. 3, with the crank and its bearings and other accessories therein, and also show- Lug a portion of the. cylinder secured to said ase.

The structure shown in the drawings is adapted for use with a two-cylinder engine of the two-cycle type; and the base structure which contains the crank chambers in whichthe mixture is compressed and supports and incloses the crank-shaft bearings is formed in two main horizontal. sections, the upper of-which is esignated. as an entirety by 12 andithe lower by 13-. The saidsections are provided on their inner or meeting edges with flanges 14 and 15, respectively, adapted to be securely united at suitable intervals by bolts 16. The upper section 12 of the base-is formed with annular seats 17 to receive the lower ends of the cyl-- formed a substantially rectangular chamber 24 having. the double function of a housing for the central journal box of the crank-.

"shaft and a gas-trapping chamber to prevent leakage or the compressed mixture around the journal box. A drain opening 2& is formed in the bottom wall of the chamber 2st and is closed by a suitable screwplug ar This chamberv 24c communicates 'onopposite' sides with the crank chambers ,20 and 21 through counterbored. circular openings 1 25 which receive the packing flanges on the ends of the stufiing boxes, as hereinafter moreparticularly desribed. 0n the outer sides-ofthe crank chambers 2 0 and 21' are 'torrned chambers 26 2? Simtion'; arid construction to the wunicating on their mrear;

' ner sides with the crank-chambers 20 and 21 contained in said through similar counterbored openings 23 and 29, respectively. The outer side, walls of the chambers 26 and 27 have plain open- .ings 30 and 31, respectively, forming supports for the outer ends of the journal boxes chambers. The upper walls ofthe crank chambers and 21 have openings 32and 33, respectively, to accommodate the pitmen 34 (Fig. 11) and permlt the mixture undergoing compression to pass into the crank chambers.

Figs. 610, inclusive,- show in detail a adapted to the shorter vor narrower chambers 24 and 27. This box comprises upper vsemi-cylindrical bearing surfaces 31', and 38,

form of journal box adapted to be secured within the chamber 26; thesame box, in a shortened form, and with but a single pair .of fastening lugs-,Qiae on each side, being :and lower mating sections 35 and 36 having ing chambers; and such rounded ends are provided with laterally projecting packing flanges 44 ground flat on their inner sides, which flanges, as best shown in Fig. 11, form a close joint with the annular shoulders formed by the counte'rboring of the openings 25, 28 and 29, as also with the outer sides of the outer endwalls of the chambers 26 and 27 which latter do not require to be counterbored for the sake of clearance, as do thewalls of the crankchambers. These annular flanges on the ends of the journal boxes are-chiefly instru-' mental in preventing leakage of the compressed gases in the crank-chamber around the journalboxes and leakage of such gases between the crank-shaft and its journal boxes is guarded against by annular packing strips or washers such as45 and 46 Fig..

11). To guard against any relative lengthwise play between the upper and lower sections 35 and 36 of each journal box, I form Jon the meeting edges-thereof cooperating and notches 36, respectively (Fig. 8).

The upper section of each journal box isformed flat (with. the exception of the end portions referred to) to fit squarely against the .flatnpperwall of its containing cham ber;. and such upper surfaceis formed with a central oil-duct 47 communicating with one or more oil-distributing grooves 48 (Fig. 10) on the under side of such top wall; the oil-duct 47, in the cases of the journal boxes occupying the chambers. 24 and 27, registering withthe lower end of ,a suitable oil-feed pipe 49 which extends through the wall of the upper base frame and is connected by a nipple 50 to a pipe leading from any suitable source of oil supply (not shown). The oil-ductof the journal box occupying the chamber 26 communicates with an integral internally threaded nipple 51 (Fig. 3), to which latter is secured an oil-supply pipe (not shown). 7

The hollow crank-shaft is shown in Figs.

4 and 11 at 52 and the cranks thereof at 53.

'Todecrease the space in each crank-chamber and thereby eifect a higher compression of the mixture, I attach to the crank-shaft by tap-screws 54 a filler-piece 55 which may be cored as shown, for the sake of lightness. The compressed gases pass from the crankchamber upwardly to the cylinder through an escape port 56 formed in the upper base section (Fig. 5).

The purpose of forming by means of the chambers 24,26 and 27 a considerable clearance space around three sides of each jourbetween the twoend bearings of each journal box in its supports a chamber or space into whichso much of the compressed mixture as may find its way through the joints formed by the flanges 44. and the counter-' bored seats in the side walls of the crankchambers will be trapped and confined; this entrapped gas in itself forming a sort of nal box (as shown in Fig. 4) is to provide cushioned packing which will absorb suchleakage as tends to arise ateach compressive impulse of vthe piston, and will in large measure prevent such leakage from passing through the joint at the opposite or outer end of the journal box. I have found by experiment that a cushioning or gas-absorb ing packing of this nature is .much more eliicient to prevent the escape of the gas than a plain cylindrical bearing equipped with ordinary stufling-box packing. The packing ring 19',- countersunk in, the cylinder wall opposite the joint between the lower end of the latter and its seat on the base frame, effectively seal'sthe lower end of the cylinder against the escape of as-at that point. From the above it will ai lsobe seen that the crank-shaft and itssupport-ing and oiling devices and their accessories are supported from and by the upper section of the base, the lower section affording in partthe necessary chamber space and constituting a closure or coveringto seal the oper ating parts from dust, dirt and the 'like. I

The construction described 15 ch1efly-1n tended for and-especially applicable to engines used on automobiles and similar motor vehicles; and it will be seen that by slmply unbolting and removing the lower section 'of the base, the shaft and its cooperating parts can be readily gotten at for the pur- 4 poses of The lower portion of each crank-chamber is.

cleaning, renewal, or repairs, etc.

- nation with a base formed in two longitudinal sections separably united and cored to form a crank-chamber and on either side of the latter a gas-trapping chamber, of longitudinally divided journal boxes in said chambers, means for securing gas-trapping said ournal boxes tothe mating halves of gether and to the topwalls of said gas-trapand a crank-shaft extending ping chambers,

substantially as through said journal boxes, described I 2. In a two-cycle'gas-engine,the combination with a base formed in two longitudinal sections separably united and cored. to

form a crank-dhamber and on either side of the latter a gas-trapping chamber having a counter-bored circular openingin one of its side walls, of journal boxes in said gas-trapping ehambers, the ends of said journal boxes lying in said openings and formed with flanges fitted to the counter-bores of said openings, and a crank shaft extending through said journal boxes, substantially as described. i

3. Ina two-cycle gas-engine, the combination with a base formed in two longitu'cli' nal sections separably united and cored to form a crank-chamber and on either side of tially as described.

the latter a gas-trapping chamber having a counter-bored circular opening n one of its side walls, of ournal'boxes 1n said gas-trapping chambers and secured to the top walls thereof, the ends of said journal boxes lying in said openings and formed with flanges fitted to the counter-bores of said openings, a crank-shaft extending through said journal boxes, and annular packing strips or washers surrounding said crank-shaft and lying against the ends of said journal boxes, substantially as described. i

4. In a two-cycle gas-engine, the combination with a base formed in two longitudinal sections separably united and cored to form a crank-chamber and on either side of the latter a gas-trapping chamber having a counter-bored circular opening in one of its side walls, of joui nal boxes in said gastrapping chambers formed with oil-ducts and with flanges fitted tothe counter-bores of said openings, a through said journal-boxes, strips or shaft and lying against the ends of .said journal boxes, and oil-conducting pipesrex tending through the top "walls of said gastrapping chambers and communicating with the oil-ducts of said journal boxes, substan- E. J. etmrox,

annular packing Witnesses:

L. R. BOBER, R. W. RODERICK.

crank-shaft extending washers surrounding said crank-f 

